I printed this file twice without supports. Resized to 90% for me and 70% for my son. Everything angles up from the base but there are some extreme angles. If your printer is setup correctly it will work. If you have doubts, use supports.
This is a large mask. It fits my average sized but extremely handsome face at 90%.
Thanks for the video Nerys!
The skull is huge. You will need to resize it to fit your face.